Handpiece



iW. F. SHAW.

HANDPECE.

APPLICATION FILED IuLY 2. Iszo.

Patented Sept. 28, 1920.

PATENT OFFICE.

WILLIAM r. sriAw, or Denver, COLORADO.

HANDPIEGE.

Specification of Letters Patent.

Patented Sept. 2S, 1920.

Applicatien filed July 2, 1520. Serial No. 393,504..

To all fw hom t may concern:

Be it known that I, WILLIAM F. SHAW, a citizen of the United States, residing at Deliver, in the county of Denver and Sta-te of Colorado, have invented a. new and useful Handpiece, of which the following is a specification.

One object of this invention is to provide novel means whereby reciprocating movement may be imparted, from a rotatable shaft to a tool holder disposed at an angle to the shaft.

Another obj ect of the invention is to provide a novel tool adapted for use on a device of the sort above set forth.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes. in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings z- Figure 1 shows in longitudinal section, a device constructed in accordance with the invention; Fig. 2 is a cross section on the line 2 2 of Fig. 1; Fig. 3 is a. cross section on the line 3-3 of Fig. 1; Fig. i is a perspective view showing one form of tool adapted to be used with the device disclosed in Fig. 1; Fig. 5 is a plan showing another form of tool adapted to be used in connection with the tool shown in Fig. 1; Fig. 6 is a cross section on the line 6-6 of Fig. 5; Fig. 7 is a cross section onthe line 7-7 of Fig. 5; Fig. 8 is a longitudinal section on the line 8-8 of Fig. 5. j

1n carrying out the invention there is provided a holder, denoted generally by the nu meral 1, the holder comprising a hollow rear end 2, a hollow forward end 3 and an intermediate bearing l, the end 2 of the holder being adapted in any suitableway, as indicated at for connection with a dental engine. The end 3 of the holder 1 is provided with an outwardly projecting boss, a slot 7 being fashioned in the extremity of the end cap 8 is meunted on the end 3 of the holder 1 and is provided with an Y cient pressure.

opening 9 adapted to receive the boss 6 on the end 3, to hold the cap detachably on the member 1, the end 3 of the holder having enough resiliency to enable the boss 6 to enter the opening 9 and to be detached from the opening, upon the application of sutil- The cap 8 has a side aperture 10 alined with the slot 6 inthe end 3 of the holder l.

A shaft 11 is journaled for rotation in the intermediate bearing 4 and extends into the hollow ends 2 and 3 of the holder 1. lVithin the end 3 of the holder, the shaft 11 is supplied with an abutment 12, which may be in the form of a collar. At its forward end, the vshaft 11 is reduced in diameter to form a Vspindle 14.

forward arm 16 and an intermediate ortion 17 connecting the arms 15 and 16. he

arm 15 is engaged about the shaft 11 to the rear of the abutment 12 and preferably in contact therewith, the spindle 141 of the shaft being rotatably received in the arm 16 of the tool carrier. Adjacent to the abutment 12, the shaft 11 is bent at an obtuse angle to form a crank 18. The arm 16 of the tool carrier is disposed at right angles to the shaft 11 and is mounted to reciprocate in the slot 7 of the end 3 and in the aperture 10 of the cap S. The arm 16 terminates in a reduced nger 19 defining a shoulder 20.

It will be clear that when rotation is imparted to the shaft, a right line reciprocation will be imparted to the arm 16 of the carrier, owing to the presence of the crank v16.

Passing to Fig. 4, there is shown a tool including a resilient split sleeve 21 and a body-22 which may have a iile surface 23, or av surface of Vany other kind, depending on the nature of the worlr in hand. rFhe linger 19 is received with the slit resilient sleeve 21, the sleeve abutting against the shoulder 20. The tool is held on the finger 19 in such a way that the tool may be rotated, thereby to dispose the body 22 of the tool properlyu with respect to the surface which is to be worked upon.

In Figs. 5, 6, 7 and 8 there is shown a tool including a body 2/1 and a split resilient sleeve. One end of the body 24 is supplied with a resilient tongue 26 extended forwardly within the sleeve 25. The b-cdv saine, the 'arms serving to strengthen and reinforce the tongue. A strip o f abrasive material indicated at 28, may be thrust beneath the isinsert'ed into the sleeve 25, the finger Will flex the tongue 26 and press the same firmly against the strip 28,

held in place on the body 24.`

Having thus described the invention, Wh at is claimed is:-v l Y Y u. l. ln a Vdevice of theclass described, a

` Y holder g1 a'shaft journaled in thev holder and' v'provided With a crank;v and a U-'shapedtooly carrier-comprising arms, one -of which is mounted on the shaft, lthe'otherof Which 1s Ymounted .on the crank.

tongue 26. vWhen the finger 19 the strip thus beingV 2. In a device of the class described, a

holder; a shaft journaled in the holder, the

Vshaft being obtusely bent to form a erank,

and being provided with an abutment at the 20 Witnesses: JJV. SHAW,

T. W. QUINN. y

,WILLIAM r. suf/LW. i Y 

